JP2013029077A - Method of manufacturing hollow structural member and combustor having hollow structural member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a hollow structural member and a combustor having the hollow structural member, capable of shortening a manufacturing time, and capable of improving workability.SOLUTION: This method of manufacturing an inner cylinder having a cooling hole 4 includes a bent plate installation preparing process S1 and a bent plate installation process S2 of installing a bent plate 10 bent to extend along the surface of a thin plate 22 and project from the surface, on the surface of the thin plate, a metal flame-spraying process S3 of manufacturing the hollow structural member 20 by forming a plane 23 on the surface of the thin plate 22 by flame-spraying molten metal M to the bent plate 10 arranged on the surface of the thin plate 22, and a cylinder shape forming process S4 of forming the hollow structural member 20 in a cylindrical shape.

Description

  The present invention relates to a method for manufacturing a heat-resistant hollow structural member, and a combustor including the hollow structural member.

  For example, in a combustor of a gas turbine, since cylindrical members such as an inner cylinder, an outer cylinder, and a tail cylinder constituting a combustion chamber are constantly exposed to high temperatures, high heat resistance is required. For this reason, these cylindrical members are made into a hollow structure, and cooling a cylindrical member is carried out by distribute | circulating cooling media, such as air and a vapor | steam, to this hollow structure part.

  Here, conventionally, the cylindrical member having such a hollow structure is a plate-shaped member having a hollow structure, that is, after the hollow structure plate is formed into a cylindrical shape of a predetermined size by pressing. Are manufactured by butting the edges of each other. Moreover, this hollow structure plate manufacturing method is disclosed in, for example, Patent Document 1, and specifically, a groove is formed on one or two metal plate surfaces by electric discharge machining or the like, and two metal plates are formed. These two metal plates are laminated and joined by brazing so that a concave groove is disposed between the plates.

Japanese Patent Laid-Open No. 2008-200836

  However, in the manufacturing method of the hollow structure plate of Patent Document 1, since the plate-like member is manufactured through processes such as the groove processing on the metal plate and brazing, the process is complicated and time is required for manufacturing. Needed. Furthermore, since the ductility of the hollow structure plate is reduced by using a brazing material, there is a problem that workability by press working is not preferable.

  The present invention has been made in view of such circumstances, and provides a method for manufacturing a hollow structure member that can achieve a reduction in manufacturing time and an improvement in workability, and a combustor including the hollow structure member. Objective.

In order to solve the above problems, the present invention employs the following means.
That is, the method for producing a hollow structural member according to the present invention is a method for producing a hollow structural member that is a plate having a hollow hole, and extends along the surface of the first substrate and extends to the surface. An installation step of installing a bending plate that is bent so as to protrude from the surface, and laminating a second substrate on the first substrate by spraying molten metal on the surface and the bending plate disposed on the surface And a thermal spraying process.

  According to such a method for manufacturing a hollow structural member, it is possible to easily manufacture the hollow structural member by installing a bent plate on the surface of the first substrate and then laminating the second substrate by metal spraying. it can. Therefore, it is possible to reliably manufacture the hollow structure member with a small number of manufacturing steps. Further, in the installation step and the thermal spraying step, since a bonding material such as a brazing material is not used, it is possible to easily perform the press work without affecting the material properties such as the ductility deterioration of the hollow structure member. .

  The bending plate may be made of a ceramic material, and may further include a melting step of dissolving and removing the bending plate.

  By installing a bent plate made of a ceramic material, the labor of the installation process can be omitted, leading to further shortening of the manufacturing process.

  Further, the first substrate has a cylindrical shape, the installation step is a step of installing the bent plate on the outer peripheral surface of the first substrate, and the spraying step is performed on the outer peripheral surface of the first substrate. May be a step of laminating.

  When the first substrate has a cylindrical shape, a cylindrical member having a hollow structure can be manufactured while shortening the manufacturing process.

  The second substrate is a first metal layer made of a first metal disposed on the first substrate side, and a second metal laminated on the first metal layer and different from the first metal. You may have the 2nd metal layer which consists of.

  By laminating the first metal and the second metal having different material characteristics, it is possible to manufacture a hollow structural member that can simultaneously achieve two material characteristics such as heat resistance and corrosion resistance.

  Furthermore, the combustor according to the present invention is a combustor having a cylindrical combustion chamber and a burner that is arranged at the center of the cylindrical combustion chamber and feeds fuel into the cylindrical combustion chamber. The chamber is formed by a hollow structural member manufactured by the above manufacturing method.

  In such a combustor, the hollow structural member used for the cylindrical combustion chamber can be manufactured while shortening the manufacturing process. Further, the hollow structure member does not have a decrease in ductility and the like, and as a result, the cylindrical combustion chamber can be easily manufactured from the hollow structure member.

  According to the method for manufacturing a hollow structural member according to the present invention and the combustor including the hollow structural member, the manufacturing of the hollow structural member includes the step of installing a bent plate and the thermal spraying process using metal spraying. It is possible to achieve a reduction in time and an improvement in workability.

It is a figure which shows typically the vicinity of a gas turbine combustor. It is a figure which expands and shows typically a combustion chamber cylinder concerning a first embodiment of the present invention. It is a flowchart which shows the procedure of the manufacturing method of the combustion chamber cylinder which concerns on 1st embodiment of this invention. It is a schematic diagram which shows the procedure of the manufacturing method of the combustion chamber cylinder which concerns on 1st embodiment of this invention. It is a flowchart which shows the procedure of the manufacturing method of the combustion chamber cylinder which concerns on 2nd embodiment of this invention. It is a schematic diagram which shows the procedure of the manufacturing method of the combustion chamber cylinder which concerns on 2nd embodiment of this invention. It is a flowchart which shows the procedure of the manufacturing method of the combustion chamber cylinder which concerns on 3rd embodiment of this invention. It is a schematic diagram which shows the procedure of the manufacturing method of the combustion chamber cylinder which concerns on 3rd embodiment of this invention. It is a figure which shows the hollow structure member used for the combustion chamber cylinder which concerns on 4th embodiment of this invention.

Hereinafter, a method for manufacturing a combustion chamber cylinder (cylindrical combustion chamber) 1 (hereinafter simply referred to as an inner cylinder 1) according to the first embodiment of the present invention will be described.
The inner cylinder 1 manufactured in the present embodiment is a cylindrical member that forms the inner wall surface of the combustion chamber 90 in the gas turbine combustor 100 as shown in FIGS. 1 and 2.
Such a gas turbine combustor 100 is configured such that fuel flows from the burner 2 into the combustion chamber 90 and is combusted to generate a high-temperature combustion gas W. This combustion gas W is sent to a turbine (not shown) through the transition piece 3 and converted into rotational power.

  Thus, in the inner cylinder 1, since the high temperature combustion gas W is produced | generated, the inside of the inner cylinder 1 is always exposed to a high temperature state at the time of gas turbine operation. Therefore, the inner cylinder 1 is manufactured using a metal material such as Inconel, which is excellent in heat resistance and corrosion resistance. A plurality of cooling holes (hollow holes) 4 penetrating from one side of the axis P direction to the other side are provided between the inner surface 1 a and the outer surface 1 b of the inner cylinder 1, and cooling air is provided in the cooling holes 4. Circulates, heat exchange is performed with the cooling air, and the inner cylinder 1 is cooled.

Next, the procedure of the manufacturing method of the inner cylinder 1 will be described along the flowchart shown in FIG.
The manufacturing method of the inner cylinder 1 includes a bent plate installation preparation step S1, a bent plate installation step (installation step) S2, a metal spraying step (spraying step) S3, and a cylindrical forming step S4.

  First, as shown in FIG. 4A, the bending plate installation preparation step S1 is executed. That is, a rectangular member having the same length as the diameter of the inner cylinder 1 is cut out from a plate material made of a metal material such as Inconel by shearing or the like. The bending plate 10 is manufactured by forming the bending concave surface 10a on the rectangular member by pressing or the like and curving the surface facing one side. The bent concave surface 10a of the bent plate 10 serves as a flow path through which cooling air flows.

  The bending plate 10 is placed on the mold 21 with the bending concave surface 10a facing upward. At this time, the bending plates 10 are arranged at equal intervals in a state where the longitudinal directions of the bending plates 10 are directed in the same direction. The mold 21 has a groove 21a formed so as to coincide with the bending convex surface 10b opposite to the bending concave surface 10a of the bending plate 10. When the bending plate 10 is placed, the bending plate 10 is It is to be accommodated.

  Subsequently, as shown in FIG. 4B, the bending plate installation step S2, that is, the thin plate (first substrate) 22 made of a metal material such as Inconel is covered from above the mold 21 on which the bending plate 10 is placed. The bent plate 10 and the thin plate 22 are temporarily joined by spot welding, and the bent plate 10 is fixed on the thin plate 22. The surface of the thin plate 22 opposite to the surface to which the bent plate 10 is joined finally becomes the inner surface 1a or the outer surface 1b of the inner cylinder 1.

  Further, as shown in FIGS. 4C, 4D, and 4E, a metal spraying step S3 is performed. That is, the thin plate 22 to which the bending plate 10 is temporarily joined is removed from the mold 21 and placed in the upside down direction. And the molten metal M which consists of inconel etc. is sprayed to the surface side in which the bending board 10 in the thin board 22 was joined, and a flat surface (so that the unevenness formed on the thin board 22 by the bending convex surface 10b of the bending board 10 is eliminated. Spray forming for forming the second substrate 23 is performed. The flat surface 23 formed in this way finally becomes the inner surface 1a or the outer surface 1b of the inner cylinder 1. Thus, a hollow structure, that is, a hollow structure member 20 having a plurality of cooling holes 4 is manufactured.

  Finally, as shown in FIG. 4F, the cylindrical step S4 is performed. That is, the hollow structural member 20 is bent into a cylindrical shape using a press process or the like, and the edges 20a of the hollow structural member 20 are joined together by welding. In this way, a hollow structure, that is, a plurality of cooling holes 4 is formed between the inner surface 1a and the outer surface 1b of the cylinder, and the inner cylinder 1 through which cooling air can flow is manufactured.

  According to the manufacturing method of the inner cylinder 1 as described above, the hollow structure member 20 can be manufactured by performing the metal spraying step S3 after temporarily joining the bent plate 10 and the thin plate 22. Therefore, the process of forming the cooling hole 4 using electric discharge machining, machining, or the like, or the process of bonding a plurality of plates by brazing or the like is unnecessary, and the process of manufacturing the hollow structural member 20 can be shortened. .

  Further, since the single molding is performed by the metal spraying step S3 without performing the bonding with the brazing material, the ductility of the hollow structural member 20 is reduced by the brazing material even when the press working is performed in the cylindrical forming step S4. It is possible to prevent the occurrence of cracks in the hollow structural member 20 due to the brazing material. Therefore, the workability of the hollow structural member 20 can be improved and can be processed into various shapes.

  Here, spray forming in which a metal product is formed by thermal spraying is a method in which the molten metal M is sprayed from a thin nozzle, and a high-pressure inert gas such as nitrogen gas is sprayed to form the molten metal M in a fine mist form. In this method, the metal product is formed by being dropped on the table in a semi-molten and semi-solid state. In addition, the shape of this metal product can be selected variously by changing the shape of the table and the movement of the table during thermal spraying.

  In the spray forming, the molten metal M rapidly cools and solidifies while falling on the table to form a metal product. Therefore, the metal structure can be made uniform without segregation, and the structure can be made finer, which leads to an improvement in the strength of the metal product. Moreover, when manufacturing the metal product which consists of alloy materials, it becomes possible to contain an alloy element in high concentration, and the metal product which consists of alloy materials with higher intensity | strength can also be manufactured.

  According to the manufacturing method of the inner cylinder 1 of the present embodiment, by performing the metal spraying step S3 with the bent plate 10 installed, the manufacturing time can be shortened by shortening the process, and the cost can be reduced. Moreover, the workability of the hollow structural member 20 can be improved, and the inner cylinder 1 having a target shape can be easily and reliably formed.

  Furthermore, the metal spraying step S3 using spray forming can achieve improvement in the strength of the hollow structural member 20 that is the material of the inner cylinder 1, and the shape, material, and plate thickness of the hollow structural member 20 can be easily selected. Therefore, the hollow structural member 20 can be manufactured easily and reliably.

Next, the manufacturing method of the inner cylinder 1 which concerns on 2nd embodiment is demonstrated along the flowchart of FIG.
In addition, the same code | symbol is attached | subjected to the component similar to 1st embodiment, and detailed description is abbreviate | omitted.
The manufacturing method of the inner cylinder 1 includes a ceramic core installation step (installation step) S10, a metal spraying step (spraying step) S3, a melting step S11, and a cylindrical forming step S4. That is, the second embodiment is different from the first embodiment in that a ceramic core installation step S10 is provided instead of the bending plate installation preparation step S1 and the bending plate installation step S2.

  First, as shown in FIG. 6A, a ceramic core installation step S10 is performed. That is, on a thin plate 22 made of a metal material such as Inconel, a plurality of ceramic cores 30 that are rod members made of, for example, silica, mullite, alumina, etc., which are ceramic materials, with their extending directions oriented in the same direction Place them at regular intervals. Note that the surface of the thin plate 22 opposite to the surface on which the ceramic core 30 is placed finally becomes the inner surface 1 a or the outer surface 1 b of the inner cylinder 1. The ceramic core 30 may have the same shape as the bent plate 10 or a round bar, and the cross-sectional shape is not limited. The space occupied by the ceramic core 30 finally becomes a flow path space through which cooling air flows.

  Next, as shown in FIG. 6B, a metal spraying step S3 is performed. In this metal spraying step S3, spray forming is used as in the first embodiment. That is, the molten metal M made of inconel or the like is sprayed from above the thin plate 22 on which the plurality of ceramic cores 30 are placed, and the flat surface 23 is formed so as to eliminate the unevenness formed on the thin plate 22 by the ceramic core 30. Perform spray forming. The flat surface 23 thus formed finally becomes the inner surface 1a or the outer surface 1b of the inner cylinder 1. In this way, a plate 31 having the ceramic core 30 embedded therein is formed.

  Subsequently, as shown in FIGS. 6C and 6D, the melting step S11 is performed. That is, by executing the ceramic core installation step S10 and the metal spraying step S3, the ceramic core 30 embedded in the plate 31 is dissolved by an alkaline solution such as sodium hydroxide or potassium hydroxide. The cooling hole 4 having the same inner peripheral surface as the outer shape of the ceramic core 30 is formed in the plate material 31, and the hollow structure member 20 having the plurality of cooling holes 4 is manufactured.

  Finally, as shown in FIG. 6E, the cylindrical step S4 is performed. This cylindrical process S4 is the same process as the first embodiment, that is, the hollow structural member 20 is bent into a cylindrical shape using a press process or the like, and the edges 20a of the hollow structural member 20 are joined together. Join by welding. In this way, a hollow structure, that is, a plurality of cooling holes 4 is formed between the inner surface 1a and the outer surface 1b of the cylinder, and the inner cylinder 1 through which cooling air can flow is manufactured.

  According to the manufacturing method of the inner cylinder 1 as described above, the hollow structure member 20 can be manufactured by performing the metal spraying step S3 after placing the ceramic core 30 on the thin plate 22. Therefore, the step of forming the cooling holes 4 using electric discharge machining, machining, or the like, or the step of bonding a plurality of plates by brazing or the like is unnecessary, and further, the bending plate installation preparation step S1 of the first embodiment is not necessary. Thus, since the operation | work etc. which install the bending board 10 in the type | mold 21 are unnecessary, the process until manufacture of the hollow structure member 20 can further be shortened.

  Further, since the single molding is performed by the metal spraying step S3 without performing the bonding with the brazing material, the ductility of the hollow structural member 20 is reduced by this brazing material even when the press working is performed in the cylindrical forming step S4. It is possible to prevent the hollow structural member 20 from being cracked, and to improve workability.

  Further, the strength of the hollow structural member 20 can be improved by the metal spraying step S3 using spray forming, and the material, shape, plate thickness, etc. of the hollow structural member 20 can be easily changed.

  Furthermore, it is easy to select various shapes of the cooling holes 4 by changing the shape of the ceramic core 30 in various ways. For example, when changing the flow path shape of the cooling air or the flow path inner diameter in the flow path direction, a complex flow path is formed by using the ceramic core 30 whose shape and diameter gradually change in the extending direction. it can.

  According to the manufacturing method of the inner cylinder 1 of the present embodiment, by performing the metal spraying step S3 in a state where the ceramic core 30 is placed on the thin plate 22, the manufacturing time can be reduced by shortening the steps. Therefore, cost reduction can also be achieved. Moreover, the workability of the hollow structural member 20 can be improved, and the inner cylinder 1 having a target shape can be easily and reliably formed.

  Furthermore, the spray forming metal spraying step S3 makes it easy to improve the strength of the hollow structural member 20 that is the material of the inner cylinder 1 and to select the material, shape, and plate thickness. And the hollow structure member 20 can be manufactured reliably. Moreover, the cooling holes 4 having various shapes can be easily formed so that the required cooling effect can be obtained by changing the shape of the ceramic core 30.

Next, the manufacturing method of the inner cylinder 1 according to the third embodiment will be described along the flowchart shown in FIG.
In addition, the same code | symbol is attached | subjected to the component similar to 1st embodiment and 2nd embodiment, and detailed description is abbreviate | omitted.
The manufacturing method of the inner cylinder 1 includes a bent plate installation preparation step S1, a bent plate installation step (installation step) S2, and a metal spraying step (spraying step) S3 as in the first embodiment. That is, the third embodiment is different from the first embodiment in that the cylindrical step S4 is not provided.

  First, as shown in FIG. 8A, the bending plate installation preparation step S1 and the bending plate installation step S2 are executed. Here, in the bending plate installation preparation step S1 and the bending plate installation step S2 of the first embodiment, the bending plate 10 is temporarily joined and installed on the thin plate 22, but in this embodiment, the thin plate 22 is installed. Instead, the bent plate 10 is temporarily bonded on the outer peripheral surface of the cylindrical member (first substrate) 40 by spot welding. Note that the surface of the cylindrical member 40 opposite to the surface to which the bent plate 10 is joined finally becomes the inner surface 1 a of the inner cylinder 1.

  Further, as shown in FIG. 8B, a metal spraying step S3 is performed. In this metal spraying step S3, spray forming is used as in the first embodiment. That is, the outer surface of the cylindrical member 40 is sprayed with the molten metal M on the surface side of the cylindrical member 40 to which the bent plate 10 is joined, and the unevenness formed on the outer peripheral surface of the cylindrical member 40 by the bent convex surface 10b of the bent plate 10 is eliminated. (Second substrate) 41 is formed by spray forming. The cylindrical outer surface 41 thus formed finally becomes the outer surface 1b of the inner cylinder 1. In this way, the hollow cylinder, that is, the inner cylinder 1 having a plurality of cooling holes 4 is manufactured.

  According to the manufacturing method of the inner cylinder 1 as described above, the inner cylinder 1 can be directly manufactured by the metal spraying step S3 after the bending plate 10 and the cylindrical member 40 are temporarily joined. Therefore, the process of forming the cooling holes 4 using electric discharge machining, machining, or the like, or the process of pasting together a plurality of plates by brazing or the like is unnecessary, and the process up to manufacture can be shortened.

  Further, since the integral molding is performed by the metal spraying step S3 without performing the bonding with the brazing material, it is possible to prevent the occurrence of cracks due to the brazing material. In other words, the workability can be improved, and various shapes can be processed.

  The material, shape, thickness, etc. can be easily selected by the metal spraying step S3 using such spray forming.

  In addition, since the hollow structural member 20 is manufactured as in the first embodiment and the second embodiment, it is not necessary to press the hollow structural member 20 to form a cylindrical shape. The inner cylinder 1 can also be manufactured using, for example, a precipitation-strengthened 21 nickel-base alloy that is difficult to press.

  According to the manufacturing method of the inner cylinder 1 of the present embodiment, by performing metal spraying in a state where the bending plate 10 is installed on the cylindrical member 40, the manufacturing time can be shortened by shortening the process, and the cost can be reduced. Moreover, workability can be improved and the inner cylinder 1 having a desired shape can be easily and reliably formed.

The strength of the inner cylinder 1 can be improved by the metal spraying step S3 using spray forming, and the material, shape, and plate thickness of the inner cylinder 1 can be easily selected.
Furthermore, since the inner cylinder 1 can be directly manufactured by spray forming without going through the hollow structural member 20, a high-strength material having high heat resistance and corrosion resistance can be used, which leads to improvement in the performance of the combustor 100.

  Here, in the present embodiment, the inner cylinder 1 is manufactured by performing metal spraying in a state where the bending plate 10 is temporarily joined to the cylindrical member 40. However, similarly to the second embodiment, the bending plate installation preparation step S1; Instead of the bending plate installation step S2, a ceramic core 30 installation step S10 may be adopted. That is, in a state where the ceramic core 30 is placed on the cylindrical member 40, the metal spraying step S3 using spray forming is executed, and the ceramic core 30 is melted by the melting step S11, and a plurality of cooling holes 4 are formed. The inner cylinder 1 may be manufactured. In this case, the process up to the production of the inner cylinder 1 can be further shortened.

Next, a method for manufacturing the inner cylinder 1 according to the fourth embodiment will be described.
As with the first embodiment, the manufacturing method of the inner cylinder 1 includes a bent plate installation preparation step S1, a bent plate installation step S2 (installation step), a metal spraying step S3 (spraying step), and a cylindrical forming step S4. I have. The fourth embodiment is different from the first embodiment in that the molten metal M used in the metal spraying step S3 is different.

First, similarly to the first embodiment, the bending plate installation preparation step S1 and the bending plate installation step S2 are executed.
Subsequently, the metal spraying step S3 is performed. In this metal spraying step S3, spray forming is used as in the first embodiment. That is, the molten metal M is thermally sprayed on the thin plate (first substrate) 22 to which the plurality of bent plates 10 are joined, and a flat surface is formed so that the unevenness formed on the thin plate 22 by the bent convex surface 10b of the bent plate 10 is eliminated. Spray forming for forming the second substrate 23 is performed. At this time, the molten metal M to be used is first sprayed with a first metal 50 having excellent ductility, such as Tomiloy, Inconel 617, and Nimonic 263. Subsequently, a second metal 51 such as Haynes 214, Haynes 230, Inconel 693 or the like excellent in heat resistance and corrosion resistance is sprayed so as to cover the surface of the first metal 50, and the first metal 50 and The hollow structural member 20 having a two-layer structure of the second metal 51 is manufactured.

  Next, the cylindrical step S4 is executed as in the first embodiment. That is, the hollow structural member 20 is formed into a cylindrical shape using press working or the like, and the edges 20a of the hollow structural member 20 are joined together by welding. At this time, the cylinder is formed so that the second metal 51 side becomes the inner surface 1a of the cylinder. In this manner, a hollow structure, that is, a plurality of cooling holes 4 is formed between the inner surface 1 a and the outer surface 1 b of the cylinder, and the inner cylinder 1 through which the cooling air can flow is manufactured.

  According to the manufacturing method of the inner cylinder 1 as described above, the process of forming the cooling holes 4 and the process of pasting together a plurality of plates by brazing or the like are unnecessary, and the process up to the manufacture of the hollow structural member 20 is performed. It can be shortened.

  In addition, since the molding is performed by the metal spraying step S3 without performing the bonding with the brazing material, the ductility of the hollow structural member 20 is lowered by the brazing material even when the press working is performed in the cylindrical forming step S4. In addition, it is possible to prevent the hollow structure member 20 from being cracked due to the brazing material, and to improve workability.

  The strength of the hollow structural member 20 can be improved by the metal spraying process S3 using spray forming, and the material, shape, plate thickness, etc. of the hollow structural member 20 can be easily selected.

  Furthermore, by having a two-layer structure of the first metal 50 and the second metal 51, the ductility is further improved by the first metal 50 even during the press working in the cylindrical step S4, and cracking is prevented. Improvement in heat resistance and corrosion resistance of the inner surface 1a of the inner cylinder 1 exposed to the high temperature environment by the second metal 51 can also be achieved.

  According to the manufacturing method of the inner cylinder 1 of the present embodiment, by performing the metal spraying step S3 with the bent plate 10 installed, the manufacturing time can be shortened by shortening the steps. The strength of the inner cylinder 1 can be improved by the metal spraying step S3 using spray forming, and the material, shape, and plate thickness of the inner cylinder 1 can be easily selected. Furthermore, by adopting a two-layer structure for the hollow structural member 20, it is possible to simultaneously improve the workability of the hollow structural member 20, and improve the heat resistance and corrosion resistance, thereby facilitating the manufacture of the inner cylinder 1 and improving the performance. Can be achieved at the same time.

  For example, in the case where the cylindrical step S4 is not provided as in the third embodiment and pressing is not required, the first metal 50 may be made of a high strength material instead of the high ductility material. . The above-mentioned Tomiloy, Inconel 617, Nimonic 263, and the like are both high ductility materials and high strength materials, and thus can be used as they are. Further, by further spraying a plurality of metal materials, it is possible to further improve the material characteristics of the inner cylinder 1 as a multilayer structure.

  Furthermore, since it is also possible to manufacture the inner cylinder 1 whose material and thickness are changed in the extending direction of the inner cylinder 1, it is possible to easily manufacture the inner cylinder 1 corresponding to the use environment.

The embodiment of the present invention has been described in detail above, but some design changes can be made without departing from the technical idea of the present invention.
In the description of the above-described embodiment, the hollow structural member 20 is applied to the inner cylinder 1. However, for example, the hollow structural member 20 may be applied to other parts such as the outer cylinder and the tail cylinder 3 of the combustor 100. it can. At this time, even if the shape of the target outer cylinder, tail cylinder 3 or the like is complicated, the hollow structural member 20 is manufactured by integral molding by spray forming, so that the target shape can be easily obtained. It can be pressed.

  Furthermore, the hollow structure member 20 can be applied to a member that requires a hollow structure, not limited to the inner cylinder 1, the outer cylinder, and the tail cylinder 3 of the combustion chamber 90 of the gas turbine combustor 100.

DESCRIPTION OF SYMBOLS 1 ... Inner cylinder (cylindrical combustion chamber), 1a ... Inner surface, 1b ... Outer surface, 2 ... Burner, 3 ... Tail cylinder, 4 ... Cooling hole (hollow hole), 10 ... Bending plate, 10a ... Bending concave surface, 10b ... Bending Convex surface, 20 ... hollow structural member, 20a ... end edge, 21 ... mold, 21a ... groove, 22 ... thin plate (first substrate), 23 ... flat surface (second substrate), 30 ... ceramic core, 31 ... plate materials 31, 40 ... cylindrical member (first substrate), 41 ... cylindrical outer surface (second substrate), 50 ... first metal, 51 ... second metal, 90 ... combustion chamber, 100 ... gas turbine combustor, W ... combustion gas, M ... Molten metal, P ... Axis, S1 ... Bending plate installation preparation step, S2 ... Bending plate installation step, S3 ... Metal spraying step, S4 ... Cylinder forming step, S10 ... Ceramic core installation step, S11 ... Melting step

Claims (5)

A method for producing a hollow structural member having a hollow hole,
On the surface of the first substrate, an installation step of installing a bending plate extending along the surface and bending so as to protrude from the surface;
And a thermal spraying step of laminating a second substrate on the first substrate by spraying a molten metal on the surface and the bent plate disposed on the surface. Method. The bent plate is made of a ceramic material,
The method for producing a hollow structure member according to claim 1, further comprising a dissolving step of dissolving and removing the bent plate. The first substrate has a cylindrical shape,
The installation step is a step of installing the bent plate on the outer peripheral surface of the first substrate,
The said thermal spraying process is a process of laminating | stacking said 2nd board | substrate on the outer peripheral surface of said 1st board | substrate, The manufacturing method of the hollow structure member of Claim 1 or 2 characterized by the above-mentioned. The second substrate is a first metal layer made of a first metal disposed on the first substrate side;
The hollow structure according to any one of claims 1 to 3, further comprising a second metal layer that is laminated on the first metal layer and is made of a second metal different from the first metal. Manufacturing method of member. A combustor having a cylindrical combustion chamber and a burner that is arranged in the center of the cylindrical combustion chamber and feeds fuel into the cylindrical combustion chamber,
The combustor, wherein the cylindrical combustion chamber is formed by a hollow structural member manufactured by the manufacturing method according to any one of claims 1 to 4.

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